linux-kernel - Re: [PATCH 05/11] spi/pxa2xx: make clock rate configurable from platform data

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Message-ID: <90529114.hOo9bzgA6o@vostro.rjw.lan>
Date:	Thu, 10 Jan 2013 14:18:08 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	linux-kernel@...r.kernel.org, grant.likely@...retlab.ca,
	linus.walleij@...aro.org, eric.y.miao@...il.com,
	linux@....linux.org.uk, haojian.zhuang@...il.com,
	chao.bi@...el.com, "H. Peter Anvin" <hpa@...ux.intel.com>
Subject: Re: [PATCH 05/11] spi/pxa2xx: make clock rate configurable from platform data

On Thursday, January 10, 2013 12:51:59 PM Mark Brown wrote:
> On Thu, Jan 10, 2013 at 01:54:41PM +0100, Rafael J. Wysocki wrote:
> > On Thursday, January 10, 2013 02:38:37 PM Mika Westerberg wrote:
> 
> > > 	3. We make the acpi_create_platform_device() match on, lets say
> > > 	   "INT33C" (a partial match), and in such case it assumes that we are
> > >            running on Lynxpoint. It will then create platform device for 'clk-lpt'.
> 
> > > 	4. Now the clk-lpt driver creates the clocks.
> 
> > > 	5. The SPI driver gets the clock it wants.
> 
> > That sounds reasonable to me.  Mark, what do you think?
> 
> Sounds sensible, yes - about what I'd expect.  Is it possible to match
> on CPUID or similar information (given that this is all in the SoC)
> instead of ACPI, that might be more robust I guess?

This particular part may be present in different SoCs.

Thanks,
Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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